Note: The fast affiliate results for Monday will be posted at PIFeedback by 12 p.m. ET. Go to the website, click on Ratings Box (the first category), then Last Night’s Results, and Monday, April 20, 2009.

ABC, as always, opened the week on a winning overnight note care of Dancing With the Stars, which averaged a hefty (and above-average) 12.8 rating/19 share from 8-9:30 p.m. Take a look at the half-hour breakdown:

Dancing With the Stars (ABC)

8:00 p.m.: 11.7/18

8:30 p.m.: 13.0/20

9:00 p.m.: 13.7/20

With even stronger lead-in support, week three of lead-out Surviving Suburbia perked up to an also dominant 7.5/11 in the overnights at 9:30 p.m. — nine percent above the 6.9/10 from one week earlier. But retention out of the last half-hour of Dancing With the Stars was still lacking at 55 percent. ABC’s on-the-fence Castle at 10 p.m. also build from one week earlier, with a second-place 5.8/10 in the overnights. But the competition on CBS a repeat of The Mentalist (#1: 6.3/11) in place of the regularly scheduled CSI: Miami, and the show dipped by 11 percent in the second half-hour (6.2/10 to 5.5/ 9).

As for Dancing With the Stars, my picks for the bottom two tonight: Lawrence Taylor and wooden cowboy Ty Murray. Most likely to bid adieu: Lawrence Taylor.

With the exception of an original installment of Rules of Engagement, distant second-place CBS aired all repeats last night (and that included aforementioned The Mentalist in place of CSI: Miami). Here are the overnight results:

CBS/Monday

8:00 p.m. The Big Bang Theory (R): 4.7/ 7 (#3)

8:30 p.m. How I Met Your Mother (R): 4.2/ 6 (#3)

9:00 p.m. Two and a Half Men (R): 7.4/11 (#2)

9:30 p.m.: Rules of Engagement: 6.5/10 (#2)

10:00 p.m.: The Mentalist (R): 6.3/11 (#1)

Interesting, isn’t it, that CBS replaced CSI: Miami with The Mentalist? Rumor has it that the hit Simon Baker drama is heading to Thursday at 10 p.m. out of CSI next season. If I were CBS, however, I would leave it in the Tuesday 9 p.m. hour. If it’s not broke, why try to fix it?

Fox kicked-off the night with a Monday installment of drama Bones, which finished second with a 5.7/ 9 in the overnights at 8 p.m. One week earlier, regularly scheduled occupant House averaged a 7.3/12. Despite the weaker lead-in support, 24 at 9 p.m. was consistent at a third-place 6.0/10.

NBC continues to struggle on Monday with its combination of Chuck (#4: 3.5/ 6), Heroes (#4: 3.7/ 6) and Medium (#3: 4.9/ 8), which always builds from lead-in Heroes in the overnights, but never among adults 18-49. And the CW’s combination of Gossip Girl (#5: 1.6/ 2) and One Tree Hill (#5: 1.7/ 2) dipped by an average of 16 percent in the overnights from their year-ago deliveries. If the overnights are down, chances are the ratings among young key females will be as well.

The Sunday, April 19 premiere of original made-for movie Natalee Holloway lifted Lifetime Movie Network to its highest ratings ever. Natalee Holloway averaged 2.39 million households, 3.2 million viewers and just over one million viewers among target women 18-49 and women 25-54 from 8-10 p.m. Comparably, that outdelivered the former record holder, The Capture of the Green River Killer, by double-digit percentages across the board. LMN is referring to Natalee Holloway as the highest rated movie in ad-supported basic cable over the last 12 months among women 18-49.

-Strong Showing for USA on Sunday:

Against original network competition on April 19, the second season-premiere of USA Network drama In Plain Sight opened with a hefty 5.1 million total viewers, 2.3 million adults 18-49 and 2.5 million adults 25-54 at 10 p.m. Comparably, growth over the series-premiere last season was 14 percent in total viewers and as much as 25 percent among adults 18-49. The season-premiere of lead-in Law & Order: Criminal Intent, meanwhile, averaged 4.6 million viewers, with 1.9 million adults 18-49 and 2.2 million adults 25-54 at 9 p.m., building by as much as 10 percent from its year-ago season-opener. Criminal Intent’s performance was particularly impressive because it faced Desperate Housewives on ABC.

She may have just been bounced from Celebrity Apprentice, but Khloe Kardashian has landed a new non-scripted gig: Kourtney and Khloe in Miami, which will air on E! The half-hour Keeping Up With the Kardashians spin-off will feature Khloe and sister Kourtney as they open up a new boutique and work on their social lives in Miami. Also coming up on E! is The Lamas Family, which will center on former The Bachelor winner Shayne Lamas (and will feature her actor father Lorenzo). Both shows are expected to begin later this year.

-Early Return for Ugly Betty on ABC: Fans of Ugly Betty anxious for its return should mark their calendars for April 30 (instead of May 7 as originally planned). ABC has announced that current occupants In the Motherhood and Samantha Who? will exit this Thursday instead of the following week.

-Debra Messing Expected to Return to NBC:

Former Will & Grace star Debra Messing is in negotiations with NBC to headline a single-camera comedy about a downsized CEO who tries to readjust as a full-time wife and mother. With My Name is Earl potentially on the chopping block, the untitled sitcom could fit right into the network’s two-hour Thursday comedy block.

-Another “D” Lister Joins I’m a Celebrity, Get Me Out of Here!:

Yesterday I reported that NBC’s upcoming revival of reality/competition I’m a Celebrity, Get Me Out of Here! will include supermodel Janice Dickinson, talk show host Geraldo Rivera, Duane “Dog the Bounty Hunter” Chapman, The Hills couple Heidi Montag and Spencer Pratt and (pending court approval) ousted Illinois Gov. Rod Blagojevich. The next “celebrity” to join the fracas is former American Idol contestant Sanjaya Malakar. Let’s just hope he does not sing in the house!

I’m a Celebrity, Get Me Out of Here! will kick-off with a two-hour installment on Monday, June 1 at 8 p.m. ET (and will air Monday through Thursday at 8 p.m. for the first three weeks, and Monday through Wednesday in the final week).